import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a purple toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  double _sliderValue = 1.0;
  bool _isEnabled = true;
  List<int> _history = [];

  void _incrementCounter() {
    if (_isEnabled) {
      setState(() {
        _counter += _sliderValue.toInt();
        _history.add(_counter);
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            // 历史记录Chip列表（顶部）
            Wrap(
              spacing: 8.0,
              children:
                  _history.map((count) {
                    return Chip(label: Text(count.toString()));
                  }).toList(),
            ),
            SizedBox(height: 20),
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            // Slider（计数文本下方）
            Slider(
              value: _sliderValue,
              min: 1.0,
              max: 10.0,
              divisions: 9,
              label: _sliderValue.round().toString(),
              onChanged: (double value) {
                setState(() {
                  _sliderValue = value;
                });
              },
            ),
            SizedBox(height: 20),
            // FAB和Switch容器
            Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                FloatingActionButton(
                  onPressed: _incrementCounter,
                  tooltip: 'Increment',
                  child: const Icon(Icons.add),
                ), // 关闭FloatingActionButton
                const SizedBox(width: 20),
                // Switch（FAB右侧）
                Switch(
                  value: _isEnabled,
                  onChanged: (value) {
                    setState(() => _isEnabled = value);
                  },
                ),
                const SizedBox(width: 20),
              ],
            ),
          ],
        ),
      ),
    );
  }
}
